Auto/Manual - Allen-Bradley PowerFlex 70 Reference Manual

Auto/Manual

Auto/Manual
36
Parameter Controlled Analog Output
Enables the analog outputs to be controlled by Datalinks to the drive.
377 [Anlg1 Out Setpt]
Vector v3
378 [Anlg2 Out Setpt]
Vector v3
Sets the analog output value from a communication
device. Example: Set [Data In Ax] to "377" (value from
communication device). Then set [Analog Outx Sel] to
"Param Cntl."
Example
Analog Output 1 controlled by DataLink C1. Output 0-10V DC with DataLink
values of 0-10000.
Setup
• [Data In C1], parameter = 304 "Analog Output 1 Setpoint"
• [Analog Out1 Sel], parameter 342 = 24 "Parameter Control"
• [Analog Out1 Hi], parameter 343 = 10.000 Volts
• [Analog Out1 Lo], parameter 344= 0.000 Volts
The device that writes to DataLink C1 now controls the voltage output of
Analog Out1. For example: 2500 = 2.5V DC, 5000 = 5.0V DC, 7500 = 7.5V
DC.
The intent of Auto/Manual is to allow the user to override the selected reference
(referred to as the "auto" reference) by either toggling a button on the
programming terminal (HIM), or continuously asserting a digital input that is
configured for Auto/Manual.
• "Alt" Function on the HIM
By toggling the "Alt" and "Auto/Man" function on the HIM, the user can
switch the speed reference back and forth between the active "Auto" source
(per drive programming and inputs) and the HIM requesting the manual
control. "Manual" switches the Reference Source to the HIM, "Auto" switches
it back to drive programming.
The HIM manual reference can be preloaded from the auto source by
enabling the [Man Ref Preload] parameter. With the preload function
enabled, when the HIM requests Manual control, the current value of the
auto source is loaded into the HIM reference before manual control is
granted. This allows the manual control to begin at the same speed as the auto
source, creating a smooth transition. If the preload function is disabled, the
speed will ramp to whatever manual reference was present in the HIM at the
time manual control was granted.
• Digital Input
By toggling the digital input programmed as Auto/Manual, the user can
switch the speed reference back and forth between the active "Auto" source
(per drive programming and inputs) and the designated Terminal Block
manual reference. When this digital input is asserted, the TB will attempt to
Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013
Default: 20.000 mA, 10.000 Volts
Min/Max: 0.000/20.000mA
–/+10.000V
Units: 0.001 mA
0.001 Volt